web.archive.org/web/20070218155236/fritha.cocolog-nifty.com/musicfile/2007/02/union_e077.html
Here’s the source people have pointed to that suggests he died around 2002-2003 which coincidences with his last credited artwork in eseries.
Here is a copy I picked up on ebay a few years ago from someone that claimed it came from a WOTC employee (the seller is from WA and I do believe they indeed do have a contact from wotc) https://instagram.com/p/Bsa_dMag6LO
I can’t say if this is real or not. The information about him just doesn’t seem to exist. There’s no ground truth example signature to compare against nor do we know if he changed his auto over time - or if he ever even signed a card for that matter!